systembc | 4d586a534d4ac3e4f084ee1f29a51856b2c316fe7745bb0cfbf13447fa3291dd

General

Target

4d586a534d4ac3e4f084ee1f29a51856b2c316fe7745bb0cfbf13447fa3291dd.exe
Size

168KB
MD5

a554fcbe9859c314ee657507f58bd1ab
SHA1

3355e28863ab4391e9bba4cf95c214acd44207c1
SHA256

4d586a534d4ac3e4f084ee1f29a51856b2c316fe7745bb0cfbf13447fa3291dd
SHA512

f5e6ebd159ec20352162837750fc6f7d45db6927ed54d75d41ab67d21e45113b596073c23e71ea39cfbe2aaf27bd46c75e2de656d63b254a1eaf208420471673

Score

10^/10

systembc trojan

Malware Config

Extracted

Family

systembc

C2

26asdcgd.com:4039

26asdcgd.xyz:4039

Signatures

SystemBC
SystemBC is a proxy and remote administration tool first seen in 2019.
trojan systembc
Executes dropped EXE 1 IoCs

Processes:

vaceo.exe

pid process

4788 vaceo.exe
Looks up external IP address via web service 2 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.

Processes:

flow ioc

24 api.ipify.org
25 api.ipify.org
Uses Tor communications 1 TTPs
Malware can proxy its traffic through Tor for more anonymity.

Connection Proxy
T1090

pid	process
4788	vaceo.exe

flow	ioc
24	api.ipify.org
25	api.ipify.org

Drops file in Windows directory 2 IoCs

Processes:

4d586a534d4ac3e4f084ee1f29a51856b2c316fe7745bb0cfbf13447fa3291dd.exe

description	ioc	process
File created	C:\Windows\Tasks\vaceo.job	4d586a534d4ac3e4f084ee1f29a51856b2c316fe7745bb0cfbf13447fa3291dd.exe
File opened for modification	C:\Windows\Tasks\vaceo.job	4d586a534d4ac3e4f084ee1f29a51856b2c316fe7745bb0cfbf13447fa3291dd.exe

Program crash 1 IoCs

Processes:

WerFault.exe

pid pid_target process target process

536 2856 WerFault.exe 4d586a534d4ac3e4f084ee1f29a51856b2c316fe7745bb0cfbf13447fa3291dd.exe

pid	pid_target	process	target process
536	2856	WerFault.exe	4d586a534d4ac3e4f084ee1f29a51856b2c316fe7745bb0cfbf13447fa3291dd.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

4d586a534d4ac3e4f084ee1f29a51856b2c316fe7745bb0cfbf13447fa3291dd.exe

pid	process
2856	4d586a534d4ac3e4f084ee1f29a51856b2c316fe7745bb0cfbf13447fa3291dd.exe
2856	4d586a534d4ac3e4f084ee1f29a51856b2c316fe7745bb0cfbf13447fa3291dd.exe

C:\Users\Admin\AppData\Local\Temp\4d586a534d4ac3e4f084ee1f29a51856b2c316fe7745bb0cfbf13447fa3291dd.exe
"C:\Users\Admin\AppData\Local\Temp\4d586a534d4ac3e4f084ee1f29a51856b2c316fe7745bb0cfbf13447fa3291dd.exe"
1⤵
- Drops file in Windows directory
- Suspicious behavior: EnumeratesProcesses
PID:2856

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 2856 -s 932
2⤵
- Program crash
PID:536

C:\ProgramData\hnsv\vaceo.exe
C:\ProgramData\hnsv\vaceo.exe start
1⤵
- Executes dropped EXE
PID:4788

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 460 -p 2856 -ip 2856
1⤵
PID:1960

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Connection Proxy

1

T1090

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Connection Proxy

1

T1090

Exfiltration

Impact

Replay Monitor

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Downloads

C:\ProgramData\hnsv\vaceo.exe
Filesize
168KB

MD5
a554fcbe9859c314ee657507f58bd1ab

SHA1
3355e28863ab4391e9bba4cf95c214acd44207c1

SHA256
4d586a534d4ac3e4f084ee1f29a51856b2c316fe7745bb0cfbf13447fa3291dd

SHA512
f5e6ebd159ec20352162837750fc6f7d45db6927ed54d75d41ab67d21e45113b596073c23e71ea39cfbe2aaf27bd46c75e2de656d63b254a1eaf208420471673

Download Submit
C:\ProgramData\hnsv\vaceo.exe
Filesize
168KB

MD5
a554fcbe9859c314ee657507f58bd1ab

SHA1
3355e28863ab4391e9bba4cf95c214acd44207c1

SHA256
4d586a534d4ac3e4f084ee1f29a51856b2c316fe7745bb0cfbf13447fa3291dd

SHA512
f5e6ebd159ec20352162837750fc6f7d45db6927ed54d75d41ab67d21e45113b596073c23e71ea39cfbe2aaf27bd46c75e2de656d63b254a1eaf208420471673

Download Submit
memory/2856-130-0x0000000000558000-0x000000000055F000-memory.dmp

Filesize
28KB

Download
memory/2856-131-0x0000000000558000-0x000000000055F000-memory.dmp

Filesize
28KB

Download
memory/2856-132-0x0000000000530000-0x0000000000539000-memory.dmp

Filesize
36KB

Download
memory/2856-133-0x0000000000400000-0x00000000004E4000-memory.dmp

Filesize
912KB

Download
memory/4788-136-0x0000000000612000-0x0000000000619000-memory.dmp

Filesize
28KB

Download
memory/4788-137-0x0000000000612000-0x0000000000619000-memory.dmp

Filesize
28KB

Download
memory/4788-138-0x0000000000400000-0x00000000004E4000-memory.dmp

Filesize
912KB

Download

Analysis

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